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My "ENGINE OIL LOW" "ADD OIL" light keeps coming on every 4000 miles. My percentage oil life left with indicator is only at 42%. The dealer says this is normal and I need to change the oil. I don't think this is normal as I sure didn't buy a GMC so I would have to add oil every 4000 miles (esp. when the Oil life is at 42% left). Any thoughts on how to escalate would be appreciated.
 

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2015 Silverado LT Texas Edition
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My "ENGINE OIL LOW" "ADD OIL" light keeps coming on every 4000 miles. My percentage oil life left with indicator is only at 42%. The dealer says this is normal and I need to change the oil. I don't think this is normal as I sure didn't buy a GMC so I would have to add oil every 4000 miles (esp. when the Oil life is at 42% left). Any thoughts on how to escalate would be appreciated.
You didn't say what year vehicle you have. That's helpful.
The engine oil "service life warning" and the "low oil" sensor/indicator are two different things, and the dealer is full of sh*t.
Is your vehicle actually low on oil, (by checking the dipstick,) (you didn't say,) or is it a faulty indication? If it's faulty, it's probably a bad sensor.
 
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I have a 2020 Denali GMC- 1500 6.2L V8. It has only 24,000. Never a problem until now. Now every 4000 to 4500 miles, the "ENGINE OIL LOW- ADD OIL" light comes on. There is no oil on the dip stick either time. First time, dealer say I just needed a oil change. I brough in today with only 4000 miles since last change because the "ENGINE OIL LOW-ADD OIL" came on again. They say is was 2 quarts low which is normal for my vehicle. Doesn't sound right to me to have to had 2 quarts every 4000 miles.....

Yes, the Oil percentage Life is at only 42% so why would have to be adding oil every 4000 miles. Having to add oil every 4000 miles what I want to do with new vehicle. This does not sound "normal" to me either.
 

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Using 1 quart of oil in 2,000 miles is 'normal' per GM. Some other makes, it's 1 qt. of oil in 1,000 miles is 'normal'.

Some shops don't remember that the newer engines take 8+ quarts of oil instead of 6. So make sure it's on the full mark immediately after an oil change. It's probably unlikely, but it is possible they aren't putting in enough oil from the get go.
 

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I have a 2020 Denali GMC- 1500 6.2L V8. It has only 24,000. Never a problem until now. Now every 4000 to 4500 miles, the "ENGINE OIL LOW- ADD OIL" light comes on. There is no oil on the dip stick either time. First time, dealer say I just needed a oil change. I brough in today with only 4000 miles since last change because the "ENGINE OIL LOW-ADD OIL" came on again. They say is was 2 quarts low which is normal for my vehicle. Doesn't sound right to me to have to had 2 quarts every 4000 miles.....

Yes, the Oil percentage Life is at only 42% so why would have to be adding oil every 4000 miles. Having to add oil every 4000 miles what I want to do with new vehicle. This does not sound "normal" to me either.
NOT NORMAL!!!
Still under warranty?
Tell them you want an oil consumption test preformed. If they refuse, go to another Dealer. My instincts tell me to go to another Dealer anyway, since they were full of sh*t on your first visit. Doesn't have to be a GMC Dealer. Can be a Chevy dealer. Tell the Dealer you would like to open a "case" and you want the GM rep. contacted, or you can write to [email protected] and ask for help. Be professional in your correspondence.

BTW.....I have a 15 5.3, change my oil every 5K religiously, and hardly ever check it between changes....
 

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Discussion Starter · #6 ·
Using 1 quart of oil in 2,000 miles is 'normal' per GM. Some other makes, it's 1 qt. of oil in 1,000 miles is 'normal'.

Some shops don't remember that the newer engines take 8+ quarts of oil instead of 6. So make sure it's on the full mark immediately after an oil change. It's probably unlikely, but it is possible they aren't putting in enough oil from the get go.
I did not purchase a 2020 Denali to have add oil every 4000 miles - they should have disclosed that as I would not purchased. According to guidelines you can get 7000 miles to 10,000 between oil changes so having to ADD OIL every 4000 miles does not sound "normal" to me
 

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Discussion Starter · #7 ·
NOT NORMAL!!!
Still under warranty?
Tell them you want an oil consumption test preformed. If they refuse, go to another Dealer. My instincts tell me to go to another Dealer anyway, since they were full of sh*t on your first visit. Doesn't have to be a GMC Dealer. Can be a Chevy dealer. Tell the Dealer you would like to open a "case" and you want the GM rep. contacted, or you can write to [email protected] and ask for help. Be professional in your correspondence.

BTW.....I have a 15 5.3, change my oil every 5K religiously, and hardly ever check it between changes....
thank you
 

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2021 GMC Sierra Denali CC 4WD Ultimate 6.2L
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OLM is capped at 7.500 miles or 1 yr.

Oil consumption could be related to the quality of the oil in use or a side effect of the Dynamic Fuel Management System (Cylinder shut down to save fuel) or both. dexos standards allow up to 13% volatility loss of engine oil. Volatility is a measurement of the amount of oil which is lost during engine operation (vaporizes). dexos allows 13% of 8 qts = 1 qt. possible loss. That's why the say 2,000 miles is normal because it could be the oil quality and not a engine problem. Many good quality synthetic's have less loss.
 

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I’m going to go with the meat head technician (forgot) these trucks from 07 and newer need 8 arts because of in our case Afm ([email protected]##) and in your case Dfm another bright idea by the wizards at gm engineering who prob don’t know what this 🔧 is and the dealer techs are not always good I do everything myself but I do have a great dealer near me if I get jammed mostly great because it’s Ben in the family for over 100 years so they care more but could be bad sensor change yourself once and see what happens 🤷‍♂️
 

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Using 1 quart of oil in 2,000 miles is 'normal' per GM. Some other makes, it's 1 qt. of oil in 1,000 miles is 'normal'.

Some shops don't remember that the newer engines take 8+ quarts of oil instead of 6. So make sure it's on the full mark immediately after an oil change. It's probably unlikely, but it is possible they aren't putting in enough oil from the get go.
“Normal” maybe for nursing you over the warranty threshold. I can’t believe that old canard is still out there. I’ve never had a new-purchased vehicle use more than teaspoon/tablespoon per change until they had over 100K on them…
 

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I monitor my oil level carefully and diligently. I have yet been able to detect any loss of oil when I check the level on the dipstick. I realize that is a crude measure, but 1/2 quart low is easy to detect. I agree with Axenolith; if there is any oil "used" and thus lost from the oil volume it is too small to make any difference.
 

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I did not purchase a 2020 Denali to have add oil every 4000 miles - they should have disclosed that as I would not purchased. According to guidelines you can get 7000 miles to 10,000 between oil changes so having to ADD OIL every 4000 miles does not sound "normal" to me
I rolled over 33K this week in my 2018 GMC 1500 6.2L, 4x4, crew cab, short bed, Denali. It has never burned oil. My daughter's 2014 GMC 1500 4.3L V6, reg cab, reg bed, rear wheel drive, Base model with 50K miles has never burned oil either. Granted, I have a sample of 2 which means the data doesn't predict anything...just examples to consider in the notion that burning easily measurable amounts of oil is normal.
 

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Just made a 2,000 mile trip pulling a 4,000 pound camper with a 2012, 5.3. Mileage was 203,000 when oil was changed a couple days before trip (using amsoil signature series). Upon return I was 2/3 qt low. I feel ok with that 🤷‍♂️
 

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A lot of oil consumption issues in gms lineups seem related to the pcv system on the drivers side valve cover. I went through 2l per oil change. Saw a video on utube pertaining to the pcv system and figured I got nothing to lose except more oil. Then I pulled the valve cover and modified the baffle as well as enlarging the existing hole right next to the pcv port as instructed in the vid. This oil change I'm only down half a liter and I'm just about due for an oil change so I'm burning a lot less oil.
 

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My "ENGINE OIL LOW" "ADD OIL" light keeps coming on every 4000 miles. My percentage oil life left with indicator is only at 42%. The dealer says this is normal and I need to change the oil. I don't think this is normal as I sure didn't buy a GMC so I would have to add oil every 4000 miles (esp. when the Oil life is at 42% left). Any thoughts on how to escalate would be appreciated.
Mine does the exact same thing. 2020 Sierra Denali. I cant go between oil changes without add oil light. Glad not only one. Any fix since original post
 

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2012 gmc sierra 1500 6l80e 6.2
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My truck has over 200k miles and doesn't even use that much oil.. My honda cars on the other hand go through a crap ton of oil...
 

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I am at 16% for my oil change. Schedule two weeks from now. I’ve been down to like a single digit and it never came on. I have 31,000 plan to take it to the dealer sooner see what they can do. Maybe it’s a bad sensor, but it does need a oil change. 2020 GMC Sierra
 
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